Who may Execute an Insulter of Rasoolullaah Sallallaahu `Alayhi Wa Sallam?

Bismillaahir Rahmaanir Raheem.

One of the most common misconceptions people have today is that none but the Khaleefah has the right to execute a person that insults Rasoolullaah Sallallaahu `Alayhi Wa Sallam, and such a misconception is to be expected when one sees the amount of ignorant people speaking on behalf of the deen, and evil scholars that try to change the deen from its original teachings to be a watered down version that the kuffaar will be happy with.

The reality is that whoever is capable of taking revenge upon the one that insults Rasoolullaah Sallallaahu `Alayhi Wa Sallam then he has the right to do so, regardless of whether it’s in a Muslim or kaafir country, because there is no treaty and security given to a person that insults Rasoolullaah Sallallaahu `Alayhi Wa Sallam.

Imaam Ibn Taymiyyah Rahimahullaah says in his magnificent Kitaab “As-Saarim Al-Maslool `Alaa Shaatimir Rasool” (The Unsheathed Sword Upon the one that Insults the Rasool Sallallaahu `Alayhi Wa Sallam) concerning a person who kills the one that insults Rasoolullaah Sallallaahu `Alayhi Wa Sallam before even giving the Khaleefah a chance to execute him:

“The most that can be said about that is that he is transgressing the position of the ruler, and the ruler may pardon the one who carried out a hadd punishment that must be carried out without referring the matter to him.

Although this was a Hadd punishment, it also comes under the heading of killing a Harbi (a kaafir in a state of war against Islaam) that needs to be obligatory killed, and it is permissible for anyone to kill a harbi. And upon this is carried the statement of (Hadhrat) Ibn `Umar Radhiallaahu `Anhu when he was told about a monk that insulted Rasoolullaah Sallallaahu `Alayhi Wa Sallam, he said: “If I heard him, I would kill him.”

Similar things happened at the time of Rasoolullaah Sallallaahu `Alayhi Wa Sallam such as the hypocrite who was killed by (Hadhrat) `Umar Radhiallaahu `Anhu without the permission of Rasoolullaah Sallallaahu `Alayhi Wa Sallam, when the hypocrite did not agree with the ruling of Rasoolullaah Sallallaahu `Alayhi Wa Sallam, then (a verse of the) Qur’aan was revealed approving that action. And there was the daughter of Marwaan who was killed by that man, and Rasoolullaah Sallallaahu `Alayhi Wa Sallam called him the supporter of Allaah and His Rasool (Sallallaahu `Alayhi Wa Sallam). That is because the one whose execution becomes necessary because of his plot to corrupt the religion is not like one who is executed because of a sin like adultery and the like.”

Assalamu Alaykum, what does this mean?? : ” And there was the daughter of Marwaan who was killed by that man, and Rasoolullaah Sallallaahu `Alayhi Wa Sallam called him the supporter of Allaah and His Rasool (Sallallaahu `Alayhi Wa Sallam). “